Date: Wed, 3 Sep 2008 17:58:18 -0400 From: "Josh Carroll" <josh.carroll@gmail.com> To: "David Malone" <dwmalone@maths.tcd.ie> Cc: Bernd Walter <ticso@cicely7.cicely.de>, ticso@cicely.de, freebsd-current@freebsd.org Subject: Re: MTRR fixup? Message-ID: <8cb6106e0809031458k51d9e23byd157bc1608613ec8@mail.gmail.com> In-Reply-To: <20080903204759.GA4898@walton.maths.tcd.ie> References: <20080903034943.GD11548@cicely7.cicely.de> <20080903204759.GA4898@walton.maths.tcd.ie>
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> You may be able to fix this by just using the memcontrol command - > it already lets you program the MTRRs. Yes, specifically: memcontrol clear -b 0x... -l 0x.... Where the argument to -b is the first address listed from memcontrol list, and the -l argument is the second address in the list. E.g. for my ranges: 0xd0000000/0x10000000 BIOS uncacheable set-by-firmware active 0xe0000000/0x20000000 BIOS uncacheable set-by-firmware active I used: memcontrol clear -b 0xd0000000 -l 0x10000000 memcontrol clear -b 0xe0000000 -l 0x20000000 No adverse reaction so far... Josh
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